以下哪种情况对驾驶安全而言最危险?Which of the following situations is the most dangerous for driving safety?
强烈的阳光直射眼睛strong sunlight directly shining into the eyes
几滴雨水落在前挡风玻璃上a few drops of rain falling on the windshield
车挡风玻璃上突然出现一大滴鸟屎a large blob of bird droppings suddenly appearing on the windshield
旁边驶过一辆大卡车a large truck passing by on the side.